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Dynamic systems with high damping rubber: Nonlinear behaviour and linear approximation
Author(s) -
Dall'Asta Andrea,
Ragni Laura
Publication year - 2008
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.825
Subject(s) - dissipative system , nonlinear system , transient (computer programming) , reliability (semiconductor) , structural engineering , natural rubber , transient response , control theory (sociology) , constitutive equation , computer science , engineering , materials science , physics , finite element method , composite material , electrical engineering , power (physics) , control (management) , quantum mechanics , artificial intelligence , operating system
High damping rubber (HDR) shows a quite complex constitutive behaviour, which is nonlinear with respect to strain and is dependent on the strain rate. In addition, it exhibits a transient response during which the material properties change (scragging or more generally the Mullins effect). A number of recent works were dedicated to analysing and modelling material behaviour. This paper studies the nonlinear dynamics of systems with restoring force produced by HDR‐based devices in order to propose a procedure to define equivalent linear models considering both transient and stationary behaviours. The reliability of these linear models is tested by evaluating the upper and lower bounds of the seismic response of a structural system equipped with HDR‐based devices (structural system with dissipative bracings and isolated systems). Copyright © 2008 John Wiley & Sons, Ltd.